1 files changed, 192 insertions, 378 deletions

diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index ada258c01a08..f08b745c2007 100644
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -33,7 +33,6 @@
 #include <net/ipv6.h>
 #include <net/ip6_route.h>
 #include <net/ip6_fib.h>
-#include <net/ip6_checksum.h>
 #include <net/iucv/af_iucv.h>
 #include <linux/hashtable.h>
 
@@ -279,9 +278,6 @@ static void qeth_l3_clear_ip_htable(struct qeth_card *card, int recover)
 
 	QETH_CARD_TEXT(card, 4, "clearip");
 
-	if (recover && card->options.sniffer)
-		return;
-
 	spin_lock_bh(&card->ip_lock);
 
 	hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) {
@@ -495,9 +491,8 @@ int qeth_l3_setrouting_v4(struct qeth_card *card)
 				  QETH_PROT_IPV4);
 	if (rc) {
 		card->options.route4.type = NO_ROUTER;
-		QETH_DBF_MESSAGE(2, "Error (0x%04x) while setting routing type"
-			" on %s. Type set to 'no router'.\n", rc,
-			QETH_CARD_IFNAME(card));
+		QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n",
+				 rc, CARD_DEVID(card));
 	}
 	return rc;
 }
@@ -519,9 +514,8 @@ int qeth_l3_setrouting_v6(struct qeth_card *card)
 				  QETH_PROT_IPV6);
 	if (rc) {
 		card->options.route6.type = NO_ROUTER;
-		QETH_DBF_MESSAGE(2, "Error (0x%04x) while setting routing type"
-			" on %s. Type set to 'no router'.\n", rc,
-			QETH_CARD_IFNAME(card));
+		QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n",
+				 rc, CARD_DEVID(card));
 	}
 	return rc;
 }
@@ -664,6 +658,8 @@ static int qeth_l3_register_addr_entry(struct qeth_card *card,
 	int rc = 0;
 	int cnt = 3;
 
+	if (card->options.sniffer)
+		return 0;
 
 	if (addr->proto == QETH_PROT_IPV4) {
 		QETH_CARD_TEXT(card, 2, "setaddr4");
@@ -698,6 +694,9 @@ static int qeth_l3_deregister_addr_entry(struct qeth_card *card,
 {
 	int rc = 0;
 
+	if (card->options.sniffer)
+		return 0;
+
 	if (addr->proto == QETH_PROT_IPV4) {
 		QETH_CARD_TEXT(card, 2, "deladdr4");
 		QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
@@ -1071,8 +1070,8 @@ qeth_diags_trace_cb(struct qeth_card *card, struct qeth_reply *reply,
 		}
 		break;
 	default:
-		QETH_DBF_MESSAGE(2, "Unknown sniffer action (0x%04x) on %s\n",
-			cmd->data.diagass.action, QETH_CARD_IFNAME(card));
+		QETH_DBF_MESSAGE(2, "Unknown sniffer action (%#06x) on device %x\n",
+				 cmd->data.diagass.action, CARD_DEVID(card));
 	}
 
 	return 0;
@@ -1349,6 +1348,7 @@ static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
 static int qeth_l3_process_inbound_buffer(struct qeth_card *card,
 				int budget, int *done)
 {
+	struct net_device *dev = card->dev;
 	int work_done = 0;
 	struct sk_buff *skb;
 	struct qeth_hdr *hdr;
@@ -1370,11 +1370,10 @@ static int qeth_l3_process_inbound_buffer(struct qeth_card *card,
 			magic = *(__u16 *)skb->data;
 			if ((card->info.type == QETH_CARD_TYPE_IQD) &&
 			    (magic == ETH_P_AF_IUCV)) {
-				skb->protocol = cpu_to_be16(ETH_P_AF_IUCV);
 				len = skb->len;
-				card->dev->header_ops->create(skb, card->dev, 0,
-					card->dev->dev_addr, "FAKELL", len);
-				skb_reset_mac_header(skb);
+				dev_hard_header(skb, dev, ETH_P_AF_IUCV,
+						dev->dev_addr, "FAKELL", len);
+				skb->protocol = eth_type_trans(skb, dev);
 				netif_receive_skb(skb);
 			} else {
 				qeth_l3_rebuild_skb(card, skb, hdr);
@@ -1518,32 +1517,25 @@ static void qeth_l3_set_rx_mode(struct net_device *dev)
 	qeth_l3_handle_promisc_mode(card);
 }
 
-static const char *qeth_l3_arp_get_error_cause(int *rc)
+static int qeth_l3_arp_makerc(int rc)
 {
-	switch (*rc) {
-	case QETH_IPA_ARP_RC_FAILED:
-		*rc = -EIO;
-		return "operation failed";
+	switch (rc) {
+	case IPA_RC_SUCCESS:
+		return 0;
 	case QETH_IPA_ARP_RC_NOTSUPP:
-		*rc = -EOPNOTSUPP;
-		return "operation not supported";
-	case QETH_IPA_ARP_RC_OUT_OF_RANGE:
-		*rc = -EINVAL;
-		return "argument out of range";
 	case QETH_IPA_ARP_RC_Q_NOTSUPP:
-		*rc = -EOPNOTSUPP;
-		return "query operation not supported";
+		return -EOPNOTSUPP;
+	case QETH_IPA_ARP_RC_OUT_OF_RANGE:
+		return -EINVAL;
 	case QETH_IPA_ARP_RC_Q_NO_DATA:
-		*rc = -ENOENT;
-		return "no query data available";
+		return -ENOENT;
 	default:
-		return "unknown error";
+		return -EIO;
 	}
 }
 
 static int qeth_l3_arp_set_no_entries(struct qeth_card *card, int no_entries)
 {
-	int tmp;
 	int rc;
 
 	QETH_CARD_TEXT(card, 3, "arpstnoe");
@@ -1561,13 +1553,10 @@ static int qeth_l3_arp_set_no_entries(struct qeth_card *card, int no_entries)
 	rc = qeth_send_simple_setassparms(card, IPA_ARP_PROCESSING,
 					  IPA_CMD_ASS_ARP_SET_NO_ENTRIES,
 					  no_entries);
-	if (rc) {
-		tmp = rc;
-		QETH_DBF_MESSAGE(2, "Could not set number of ARP entries on "
-			"%s: %s (0x%x/%d)\n", QETH_CARD_IFNAME(card),
-			qeth_l3_arp_get_error_cause(&rc), tmp, tmp);
-	}
-	return rc;
+	if (rc)
+		QETH_DBF_MESSAGE(2, "Could not set number of ARP entries on device %x: %#x\n",
+				 CARD_DEVID(card), rc);
+	return qeth_l3_arp_makerc(rc);
 }
 
 static __u32 get_arp_entry_size(struct qeth_card *card,
@@ -1717,7 +1706,6 @@ static int qeth_l3_query_arp_cache_info(struct qeth_card *card,
 {
 	struct qeth_cmd_buffer *iob;
 	struct qeth_ipa_cmd *cmd;
-	int tmp;
 	int rc;
 
 	QETH_CARD_TEXT_(card, 3, "qarpipv%i", prot);
@@ -1736,15 +1724,10 @@ static int qeth_l3_query_arp_cache_info(struct qeth_card *card,
 	rc = qeth_l3_send_ipa_arp_cmd(card, iob,
 			   QETH_SETASS_BASE_LEN+QETH_ARP_CMD_LEN,
 			   qeth_l3_arp_query_cb, (void *)qinfo);
-	if (rc) {
-		tmp = rc;
-		QETH_DBF_MESSAGE(2,
-			"Error while querying ARP cache on %s: %s "
-			"(0x%x/%d)\n", QETH_CARD_IFNAME(card),
-			qeth_l3_arp_get_error_cause(&rc), tmp, tmp);
-	}
-
-	return rc;
+	if (rc)
+		QETH_DBF_MESSAGE(2, "Error while querying ARP cache on device %x: %#x\n",
+				 CARD_DEVID(card), rc);
+	return qeth_l3_arp_makerc(rc);
 }
 
 static int qeth_l3_arp_query(struct qeth_card *card, char __user *udata)
@@ -1794,15 +1777,18 @@ out:
 	return rc;
 }
 
-static int qeth_l3_arp_add_entry(struct qeth_card *card,
-				struct qeth_arp_cache_entry *entry)
+static int qeth_l3_arp_modify_entry(struct qeth_card *card,
+				    struct qeth_arp_cache_entry *entry,
+				    enum qeth_arp_process_subcmds arp_cmd)
 {
+	struct qeth_arp_cache_entry *cmd_entry;
 	struct qeth_cmd_buffer *iob;
-	char buf[16];
-	int tmp;
 	int rc;
 
-	QETH_CARD_TEXT(card, 3, "arpadent");
+	if (arp_cmd == IPA_CMD_ASS_ARP_ADD_ENTRY)
+		QETH_CARD_TEXT(card, 3, "arpadd");
+	else
+		QETH_CARD_TEXT(card, 3, "arpdel");
 
 	/*
 	 * currently GuestLAN only supports the ARP assist function
@@ -1815,71 +1801,25 @@ static int qeth_l3_arp_add_entry(struct qeth_card *card,
 		return -EOPNOTSUPP;
 	}
 
-	iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
-				       IPA_CMD_ASS_ARP_ADD_ENTRY,
-				       sizeof(struct qeth_arp_cache_entry),
-				       QETH_PROT_IPV4);
+	iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING, arp_cmd,
+				       sizeof(*cmd_entry), QETH_PROT_IPV4);
 	if (!iob)
 		return -ENOMEM;
-	rc = qeth_send_setassparms(card, iob,
-				   sizeof(struct qeth_arp_cache_entry),
-				   (unsigned long) entry,
-				   qeth_setassparms_cb, NULL);
-	if (rc) {
-		tmp = rc;
-		qeth_l3_ipaddr4_to_string((u8 *)entry->ipaddr, buf);
-		QETH_DBF_MESSAGE(2, "Could not add ARP entry for address %s "
-			"on %s: %s (0x%x/%d)\n", buf, QETH_CARD_IFNAME(card),
-			qeth_l3_arp_get_error_cause(&rc), tmp, tmp);
-	}
-	return rc;
-}
-
-static int qeth_l3_arp_remove_entry(struct qeth_card *card,
-				struct qeth_arp_cache_entry *entry)
-{
-	struct qeth_cmd_buffer *iob;
-	char buf[16] = {0, };
-	int tmp;
-	int rc;
 
-	QETH_CARD_TEXT(card, 3, "arprment");
+	cmd_entry = &__ipa_cmd(iob)->data.setassparms.data.arp_entry;
+	ether_addr_copy(cmd_entry->macaddr, entry->macaddr);
+	memcpy(cmd_entry->ipaddr, entry->ipaddr, 4);
+	rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
+	if (rc)
+		QETH_DBF_MESSAGE(2, "Could not modify (cmd: %#x) ARP entry on device %x: %#x\n",
+				 arp_cmd, CARD_DEVID(card), rc);
 
-	/*
-	 * currently GuestLAN only supports the ARP assist function
-	 * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_REMOVE_ENTRY;
-	 * thus we say EOPNOTSUPP for this ARP function
-	 */
-	if (card->info.guestlan)
-		return -EOPNOTSUPP;
-	if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
-		return -EOPNOTSUPP;
-	}
-	memcpy(buf, entry, 12);
-	iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
-				       IPA_CMD_ASS_ARP_REMOVE_ENTRY,
-				       12,
-				       QETH_PROT_IPV4);
-	if (!iob)
-		return -ENOMEM;
-	rc = qeth_send_setassparms(card, iob,
-				   12, (unsigned long)buf,
-				   qeth_setassparms_cb, NULL);
-	if (rc) {
-		tmp = rc;
-		memset(buf, 0, 16);
-		qeth_l3_ipaddr4_to_string((u8 *)entry->ipaddr, buf);
-		QETH_DBF_MESSAGE(2, "Could not delete ARP entry for address %s"
-			" on %s: %s (0x%x/%d)\n", buf, QETH_CARD_IFNAME(card),
-			qeth_l3_arp_get_error_cause(&rc), tmp, tmp);
-	}
-	return rc;
+	return qeth_l3_arp_makerc(rc);
 }
 
 static int qeth_l3_arp_flush_cache(struct qeth_card *card)
 {
 	int rc;
-	int tmp;
 
 	QETH_CARD_TEXT(card, 3, "arpflush");
 
@@ -1895,19 +1835,17 @@ static int qeth_l3_arp_flush_cache(struct qeth_card *card)
 	}
 	rc = qeth_send_simple_setassparms(card, IPA_ARP_PROCESSING,
 					  IPA_CMD_ASS_ARP_FLUSH_CACHE, 0);
-	if (rc) {
-		tmp = rc;
-		QETH_DBF_MESSAGE(2, "Could not flush ARP cache on %s: %s "
-			"(0x%x/%d)\n", QETH_CARD_IFNAME(card),
-			qeth_l3_arp_get_error_cause(&rc), tmp, tmp);
-	}
-	return rc;
+	if (rc)
+		QETH_DBF_MESSAGE(2, "Could not flush ARP cache on device %x: %#x\n",
+				 CARD_DEVID(card), rc);
+	return qeth_l3_arp_makerc(rc);
 }
 
 static int qeth_l3_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 {
 	struct qeth_card *card = dev->ml_priv;
 	struct qeth_arp_cache_entry arp_entry;
+	enum qeth_arp_process_subcmds arp_cmd;
 	int rc = 0;
 
 	switch (cmd) {
@@ -1926,27 +1864,16 @@ static int qeth_l3_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 		rc = qeth_l3_arp_query(card, rq->ifr_ifru.ifru_data);
 		break;
 	case SIOC_QETH_ARP_ADD_ENTRY:
-		if (!capable(CAP_NET_ADMIN)) {
-			rc = -EPERM;
-			break;
-		}
-		if (copy_from_user(&arp_entry, rq->ifr_ifru.ifru_data,
-				   sizeof(struct qeth_arp_cache_entry)))
-			rc = -EFAULT;
-		else
-			rc = qeth_l3_arp_add_entry(card, &arp_entry);
-		break;
 	case SIOC_QETH_ARP_REMOVE_ENTRY:
-		if (!capable(CAP_NET_ADMIN)) {
-			rc = -EPERM;
-			break;
-		}
-		if (copy_from_user(&arp_entry, rq->ifr_ifru.ifru_data,
-				   sizeof(struct qeth_arp_cache_entry)))
-			rc = -EFAULT;
-		else
-			rc = qeth_l3_arp_remove_entry(card, &arp_entry);
-		break;
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		if (copy_from_user(&arp_entry, rq->ifr_data, sizeof(arp_entry)))
+			return -EFAULT;
+
+		arp_cmd = (cmd == SIOC_QETH_ARP_ADD_ENTRY) ?
+				IPA_CMD_ASS_ARP_ADD_ENTRY :
+				IPA_CMD_ASS_ARP_REMOVE_ENTRY;
+		return qeth_l3_arp_modify_entry(card, &arp_entry, arp_cmd);
 	case SIOC_QETH_ARP_FLUSH_CACHE:
 		if (!capable(CAP_NET_ADMIN)) {
 			rc = -EPERM;
@@ -1983,39 +1910,38 @@ static int qeth_l3_get_cast_type(struct sk_buff *skb)
 	rcu_read_unlock();
 
 	/* no neighbour (eg AF_PACKET), fall back to target's IP address ... */
-	if (be16_to_cpu(skb->protocol) == ETH_P_IPV6)
-		return ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) ?
-				RTN_MULTICAST : RTN_UNICAST;
-	else if (be16_to_cpu(skb->protocol) == ETH_P_IP)
+	switch (qeth_get_ip_version(skb)) {
+	case 4:
 		return ipv4_is_multicast(ip_hdr(skb)->daddr) ?
 				RTN_MULTICAST : RTN_UNICAST;
-
-	/* ... and MAC address */
-	if (ether_addr_equal_64bits(eth_hdr(skb)->h_dest, skb->dev->broadcast))
-		return RTN_BROADCAST;
-	if (is_multicast_ether_addr(eth_hdr(skb)->h_dest))
-		return RTN_MULTICAST;
-
-	/* default to unicast */
-	return RTN_UNICAST;
+	case 6:
+		return ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) ?
+				RTN_MULTICAST : RTN_UNICAST;
+	default:
+		/* ... and MAC address */
+		if (ether_addr_equal_64bits(eth_hdr(skb)->h_dest,
+					    skb->dev->broadcast))
+			return RTN_BROADCAST;
+		if (is_multicast_ether_addr(eth_hdr(skb)->h_dest))
+			return RTN_MULTICAST;
+		/* default to unicast */
+		return RTN_UNICAST;
+	}
 }
 
 static void qeth_l3_fill_af_iucv_hdr(struct qeth_hdr *hdr, struct sk_buff *skb,
 				     unsigned int data_len)
 {
 	char daddr[16];
-	struct af_iucv_trans_hdr *iucv_hdr;
 
-	memset(hdr, 0, sizeof(struct qeth_hdr));
 	hdr->hdr.l3.id = QETH_HEADER_TYPE_LAYER3;
 	hdr->hdr.l3.length = data_len;
 	hdr->hdr.l3.flags = QETH_HDR_IPV6 | QETH_CAST_UNICAST;
 
-	iucv_hdr = (struct af_iucv_trans_hdr *)(skb_mac_header(skb) + ETH_HLEN);
 	memset(daddr, 0, sizeof(daddr));
 	daddr[0] = 0xfe;
 	daddr[1] = 0x80;
-	memcpy(&daddr[8], iucv_hdr->destUserID, 8);
+	memcpy(&daddr[8], iucv_trans_hdr(skb)->destUserID, 8);
 	memcpy(hdr->hdr.l3.next_hop.ipv6_addr, daddr, 16);
 }
 
@@ -2034,26 +1960,33 @@ static void qeth_l3_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 				struct sk_buff *skb, int ipv, int cast_type,
 				unsigned int data_len)
 {
-	memset(hdr, 0, sizeof(struct qeth_hdr));
-	hdr->hdr.l3.id = QETH_HEADER_TYPE_LAYER3;
+	struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
+
 	hdr->hdr.l3.length = data_len;
 
-	/*
-	 * before we're going to overwrite this location with next hop ip.
-	 * v6 uses passthrough, v4 sets the tag in the QDIO header.
-	 */
-	if (skb_vlan_tag_present(skb)) {
-		if ((ipv == 4) || (card->info.type == QETH_CARD_TYPE_IQD))
-			hdr->hdr.l3.ext_flags = QETH_HDR_EXT_VLAN_FRAME;
-		else
-			hdr->hdr.l3.ext_flags = QETH_HDR_EXT_INCLUDE_VLAN_TAG;
-		hdr->hdr.l3.vlan_id = skb_vlan_tag_get(skb);
+	if (skb_is_gso(skb)) {
+		hdr->hdr.l3.id = QETH_HEADER_TYPE_L3_TSO;
+	} else {
+		hdr->hdr.l3.id = QETH_HEADER_TYPE_LAYER3;
+		if (skb->ip_summed == CHECKSUM_PARTIAL) {
+			qeth_tx_csum(skb, &hdr->hdr.l3.ext_flags, ipv);
+			/* some HW requires combined L3+L4 csum offload: */
+			if (ipv == 4)
+				hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_CSUM_HDR_REQ;
+			if (card->options.performance_stats)
+				card->perf_stats.tx_csum++;
+		}
 	}
 
-	if (!skb_is_gso(skb) && skb->ip_summed == CHECKSUM_PARTIAL) {
-		qeth_tx_csum(skb, &hdr->hdr.l3.ext_flags, ipv);
-		if (card->options.performance_stats)
-			card->perf_stats.tx_csum++;
+	if (ipv == 4 || IS_IQD(card)) {
+		/* NETIF_F_HW_VLAN_CTAG_TX */
+		if (skb_vlan_tag_present(skb)) {
+			hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_VLAN_FRAME;
+			hdr->hdr.l3.vlan_id = skb_vlan_tag_get(skb);
+		}
+	} else if (veth->h_vlan_proto == htons(ETH_P_8021Q)) {
+		hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_INCLUDE_VLAN_TAG;
+		hdr->hdr.l3.vlan_id = ntohs(veth->h_vlan_TCI);
 	}
 
 	/* OSA only: */
@@ -2094,85 +2027,41 @@ static void qeth_l3_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 	rcu_read_unlock();
 }
 
-static void qeth_tso_fill_header(struct qeth_card *card,
-		struct qeth_hdr *qhdr, struct sk_buff *skb)
+static void qeth_l3_fixup_headers(struct sk_buff *skb)
 {
-	struct qeth_hdr_tso *hdr = (struct qeth_hdr_tso *)qhdr;
-	struct tcphdr *tcph = tcp_hdr(skb);
 	struct iphdr *iph = ip_hdr(skb);
-	struct ipv6hdr *ip6h = ipv6_hdr(skb);
-
-	/*fix header to TSO values ...*/
-	hdr->hdr.hdr.l3.id = QETH_HEADER_TYPE_TSO;
-	/*set values which are fix for the first approach ...*/
-	hdr->ext.hdr_tot_len = (__u16) sizeof(struct qeth_hdr_ext_tso);
-	hdr->ext.imb_hdr_no  = 1;
-	hdr->ext.hdr_type    = 1;
-	hdr->ext.hdr_version = 1;
-	hdr->ext.hdr_len     = 28;
-	/*insert non-fix values */
-	hdr->ext.mss = skb_shinfo(skb)->gso_size;
-	hdr->ext.dg_hdr_len = (__u16)(ip_hdrlen(skb) + tcp_hdrlen(skb));
-	hdr->ext.payload_len = (__u16)(skb->len - hdr->ext.dg_hdr_len -
-				       sizeof(struct qeth_hdr_tso));
-	tcph->check = 0;
-	if (be16_to_cpu(skb->protocol) == ETH_P_IPV6) {
-		ip6h->payload_len = 0;
-		tcph->check = ~csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
-					       0, IPPROTO_TCP, 0);
-	} else {
-		/*OSA want us to set these values ...*/
-		tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr,
-					 0, IPPROTO_TCP, 0);
-		iph->tot_len = 0;
-		iph->check = 0;
-	}
-}
-
-/**
- * qeth_l3_get_elements_no_tso() - find number of SBALEs for skb data for tso
- * @card:			   qeth card structure, to check max. elems.
- * @skb:			   SKB address
- * @extra_elems:		   extra elems needed, to check against max.
- *
- * Returns the number of pages, and thus QDIO buffer elements, needed to cover
- * skb data, including linear part and fragments, but excluding TCP header.
- * (Exclusion of TCP header distinguishes it from qeth_get_elements_no().)
- * Checks if the result plus extra_elems fits under the limit for the card.
- * Returns 0 if it does not.
- * Note: extra_elems is not included in the returned result.
- */
-static int qeth_l3_get_elements_no_tso(struct qeth_card *card,
-			struct sk_buff *skb, int extra_elems)
-{
-	addr_t start = (addr_t)tcp_hdr(skb) + tcp_hdrlen(skb);
-	addr_t end = (addr_t)skb->data + skb_headlen(skb);
-	int elements = qeth_get_elements_for_frags(skb);
-
-	if (start != end)
-		elements += qeth_get_elements_for_range(start, end);
 
-	if ((elements + extra_elems) > QETH_MAX_BUFFER_ELEMENTS(card)) {
-		QETH_DBF_MESSAGE(2,
-	"Invalid size of TSO IP packet (Number=%d / Length=%d). Discarded.\n",
-				elements + extra_elems, skb->len);
-		return 0;
+	/* this is safe, IPv6 traffic takes a different path */
+	if (skb->ip_summed == CHECKSUM_PARTIAL)
+		iph->check = 0;
+	if (skb_is_gso(skb)) {
+		iph->tot_len = 0;
+		tcp_hdr(skb)->check = ~tcp_v4_check(0, iph->saddr,
+						    iph->daddr, 0);
 	}
-	return elements;
 }
 
-static int qeth_l3_xmit_offload(struct qeth_card *card, struct sk_buff *skb,
-				struct qeth_qdio_out_q *queue, int ipv,
-				int cast_type)
+static int qeth_l3_xmit(struct qeth_card *card, struct sk_buff *skb,
+			struct qeth_qdio_out_q *queue, int ipv, int cast_type)
 {
-	const unsigned int hw_hdr_len = sizeof(struct qeth_hdr);
-	unsigned int frame_len, elements;
+	unsigned int hw_hdr_len, proto_len, frame_len, elements;
 	unsigned char eth_hdr[ETH_HLEN];
+	bool is_tso = skb_is_gso(skb);
+	unsigned int data_offset = 0;
 	struct qeth_hdr *hdr = NULL;
 	unsigned int hd_len = 0;
 	int push_len, rc;
 	bool is_sg;
 
+	if (is_tso) {
+		hw_hdr_len = sizeof(struct qeth_hdr_tso);
+		proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb) -
+			    ETH_HLEN;
+	} else {
+		hw_hdr_len = sizeof(struct qeth_hdr);
+		proto_len = 0;
+	}
+
 	/* re-use the L2 header area for the HW header: */
 	rc = skb_cow_head(skb, hw_hdr_len - ETH_HLEN);
 	if (rc)
@@ -2181,28 +2070,37 @@ static int qeth_l3_xmit_offload(struct qeth_card *card, struct sk_buff *skb,
 	skb_pull(skb, ETH_HLEN);
 	frame_len = skb->len;
 
-	push_len = qeth_add_hw_header(card, skb, &hdr, hw_hdr_len, 0,
+	qeth_l3_fixup_headers(skb);
+	push_len = qeth_add_hw_header(card, skb, &hdr, hw_hdr_len, proto_len,
 				      &elements);
 	if (push_len < 0)
 		return push_len;
-	if (!push_len) {
-		/* hdr was added discontiguous from skb->data */
-		hd_len = hw_hdr_len;
+	if (is_tso || !push_len) {
+		/* HW header needs its own buffer element. */
+		hd_len = hw_hdr_len + proto_len;
+		data_offset = push_len + proto_len;
 	}
+	memset(hdr, 0, hw_hdr_len);
 
-	if (skb->protocol == htons(ETH_P_AF_IUCV))
+	if (skb->protocol == htons(ETH_P_AF_IUCV)) {
 		qeth_l3_fill_af_iucv_hdr(hdr, skb, frame_len);
-	else
+	} else {
 		qeth_l3_fill_header(card, hdr, skb, ipv, cast_type, frame_len);
+		if (is_tso)
+			qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
+					  frame_len - proto_len, skb,
+					  proto_len);
+	}
 
 	is_sg = skb_is_nonlinear(skb);
 	if (IS_IQD(card)) {
-		rc = qeth_do_send_packet_fast(queue, skb, hdr, 0, hd_len);
+		rc = qeth_do_send_packet_fast(queue, skb, hdr, data_offset,
+					      hd_len);
 	} else {
 		/* TODO: drop skb_orphan() once TX completion is fast enough */
 		skb_orphan(skb);
-		rc = qeth_do_send_packet(card, queue, skb, hdr, 0, hd_len,
-					 elements);
+		rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
+					 hd_len, elements);
 	}
 
 	if (!rc) {
@@ -2210,6 +2108,10 @@ static int qeth_l3_xmit_offload(struct qeth_card *card, struct sk_buff *skb,
 			card->perf_stats.buf_elements_sent += elements;
 			if (is_sg)
 				card->perf_stats.sg_skbs_sent++;
+			if (is_tso) {
+				card->perf_stats.large_send_bytes += frame_len;
+				card->perf_stats.large_send_cnt++;
+			}
 		}
 	} else {
 		if (!push_len)
@@ -2224,118 +2126,6 @@ static int qeth_l3_xmit_offload(struct qeth_card *card, struct sk_buff *skb,
 	return rc;
 }
 
-static int qeth_l3_xmit(struct qeth_card *card, struct sk_buff *skb,
-			struct qeth_qdio_out_q *queue, int ipv, int cast_type)
-{
-	int elements, len, rc;
-	__be16 *tag;
-	struct qeth_hdr *hdr = NULL;
-	int hdr_elements = 0;
-	struct sk_buff *new_skb = NULL;
-	int tx_bytes = skb->len;
-	unsigned int hd_len;
-	bool use_tso, is_sg;
-
-	/* Ignore segment size from skb_is_gso(), 1 page is always used. */
-	use_tso = skb_is_gso(skb) &&
-		  (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV4);
-
-	/* create a clone with writeable headroom */
-	new_skb = skb_realloc_headroom(skb, sizeof(struct qeth_hdr_tso) +
-					    VLAN_HLEN);
-	if (!new_skb)
-		return -ENOMEM;
-
-	if (ipv == 4) {
-		skb_pull(new_skb, ETH_HLEN);
-	} else if (skb_vlan_tag_present(new_skb)) {
-		skb_push(new_skb, VLAN_HLEN);
-		skb_copy_to_linear_data(new_skb, new_skb->data + 4, 4);
-		skb_copy_to_linear_data_offset(new_skb, 4,
-					       new_skb->data + 8, 4);
-		skb_copy_to_linear_data_offset(new_skb, 8,
-					       new_skb->data + 12, 4);
-		tag = (__be16 *)(new_skb->data + 12);
-		*tag = cpu_to_be16(ETH_P_8021Q);
-		*(tag + 1) = cpu_to_be16(skb_vlan_tag_get(new_skb));
-	}
-
-	/* fix hardware limitation: as long as we do not have sbal
-	 * chaining we can not send long frag lists
-	 */
-	if ((use_tso && !qeth_l3_get_elements_no_tso(card, new_skb, 1)) ||
-	    (!use_tso && !qeth_get_elements_no(card, new_skb, 0, 0))) {
-		rc = skb_linearize(new_skb);
-
-		if (card->options.performance_stats) {
-			if (rc)
-				card->perf_stats.tx_linfail++;
-			else
-				card->perf_stats.tx_lin++;
-		}
-		if (rc)
-			goto out;
-	}
-
-	if (use_tso) {
-		hdr = skb_push(new_skb, sizeof(struct qeth_hdr_tso));
-		memset(hdr, 0, sizeof(struct qeth_hdr_tso));
-		qeth_l3_fill_header(card, hdr, new_skb, ipv, cast_type,
-				    new_skb->len - sizeof(struct qeth_hdr_tso));
-		qeth_tso_fill_header(card, hdr, new_skb);
-		hdr_elements++;
-	} else {
-		hdr = skb_push(new_skb, sizeof(struct qeth_hdr));
-		qeth_l3_fill_header(card, hdr, new_skb, ipv, cast_type,
-				    new_skb->len - sizeof(struct qeth_hdr));
-	}
-
-	elements = use_tso ?
-		   qeth_l3_get_elements_no_tso(card, new_skb, hdr_elements) :
-		   qeth_get_elements_no(card, new_skb, hdr_elements, 0);
-	if (!elements) {
-		rc = -E2BIG;
-		goto out;
-	}
-	elements += hdr_elements;
-
-	if (use_tso) {
-		hd_len = sizeof(struct qeth_hdr_tso) +
-			 ip_hdrlen(new_skb) + tcp_hdrlen(new_skb);
-		len = hd_len;
-	} else {
-		hd_len = 0;
-		len = sizeof(struct qeth_hdr_layer3);
-	}
-
-	if (qeth_hdr_chk_and_bounce(new_skb, &hdr, len)) {
-		rc = -EINVAL;
-		goto out;
-	}
-
-	is_sg = skb_is_nonlinear(new_skb);
-	rc = qeth_do_send_packet(card, queue, new_skb, hdr, hd_len, hd_len,
-				 elements);
-out:
-	if (!rc) {
-		if (new_skb != skb)
-			dev_kfree_skb_any(skb);
-		if (card->options.performance_stats) {
-			card->perf_stats.buf_elements_sent += elements;
-			if (is_sg)
-				card->perf_stats.sg_skbs_sent++;
-			if (use_tso) {
-				card->perf_stats.large_send_bytes += tx_bytes;
-				card->perf_stats.large_send_cnt++;
-			}
-		}
-	} else {
-		if (new_skb != skb)
-			dev_kfree_skb_any(new_skb);
-	}
-	return rc;
-}
-
 static netdev_tx_t qeth_l3_hard_start_xmit(struct sk_buff *skb,
 					   struct net_device *dev)
 {
@@ -2355,7 +2145,7 @@ static netdev_tx_t qeth_l3_hard_start_xmit(struct sk_buff *skb,
 			goto tx_drop;
 	}
 
-	if (card->state != CARD_STATE_UP || !card->lan_online) {
+	if (card->state != CARD_STATE_UP) {
 		card->stats.tx_carrier_errors++;
 		goto tx_drop;
 	}
@@ -2371,10 +2161,11 @@ static netdev_tx_t qeth_l3_hard_start_xmit(struct sk_buff *skb,
 	}
 	netif_stop_queue(dev);
 
-	if (IS_IQD(card) || (!skb_is_gso(skb) && ipv == 4))
-		rc = qeth_l3_xmit_offload(card, skb, queue, ipv, cast_type);
-	else
+	if (ipv == 4 || IS_IQD(card))
 		rc = qeth_l3_xmit(card, skb, queue, ipv, cast_type);
+	else
+		rc = qeth_xmit(card, skb, queue, ipv, cast_type,
+			       qeth_l3_fill_header);
 
 	if (!rc) {
 		card->stats.tx_packets++;
@@ -2412,7 +2203,10 @@ static int __qeth_l3_open(struct net_device *dev)
 
 	if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
 		napi_enable(&card->napi);
+		local_bh_disable();
 		napi_schedule(&card->napi);
+		/* kick-start the NAPI softirq: */
+		local_bh_enable();
 	} else
 		rc = -EIO;
 	return rc;
@@ -2476,6 +2270,15 @@ qeth_l3_neigh_setup(struct net_device *dev, struct neigh_parms *np)
 	return 0;
 }
 
+static netdev_features_t qeth_l3_osa_features_check(struct sk_buff *skb,
+						    struct net_device *dev,
+						    netdev_features_t features)
+{
+	if (qeth_get_ip_version(skb) != 4)
+		features &= ~NETIF_F_HW_VLAN_CTAG_TX;
+	return qeth_features_check(skb, dev, features);
+}
+
 static const struct net_device_ops qeth_l3_netdev_ops = {
 	.ndo_open		= qeth_l3_open,
 	.ndo_stop		= qeth_l3_stop,
@@ -2496,7 +2299,7 @@ static const struct net_device_ops qeth_l3_osa_netdev_ops = {
 	.ndo_stop		= qeth_l3_stop,
 	.ndo_get_stats		= qeth_get_stats,
 	.ndo_start_xmit		= qeth_l3_hard_start_xmit,
-	.ndo_features_check	= qeth_features_check,
+	.ndo_features_check	= qeth_l3_osa_features_check,
 	.ndo_validate_addr	= eth_validate_addr,
 	.ndo_set_rx_mode	= qeth_l3_set_rx_mode,
 	.ndo_do_ioctl		= qeth_do_ioctl,
@@ -2508,11 +2311,12 @@ static const struct net_device_ops qeth_l3_osa_netdev_ops = {
 	.ndo_neigh_setup	= qeth_l3_neigh_setup,
 };
 
-static int qeth_l3_setup_netdev(struct qeth_card *card)
+static int qeth_l3_setup_netdev(struct qeth_card *card, bool carrier_ok)
 {
+	unsigned int headroom;
 	int rc;
 
-	if (card->dev->netdev_ops)
+	if (qeth_netdev_is_registered(card->dev))
 		return 0;
 
 	if (card->info.type == QETH_CARD_TYPE_OSD ||
@@ -2542,9 +2346,22 @@ static int qeth_l3_setup_netdev(struct qeth_card *card)
 			card->dev->hw_features |= NETIF_F_IPV6_CSUM;
 			card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
 		}
+		if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) {
+			card->dev->hw_features |= NETIF_F_TSO6;
+			card->dev->vlan_features |= NETIF_F_TSO6;
+		}
+
+		/* allow for de-acceleration of NETIF_F_HW_VLAN_CTAG_TX: */
+		if (card->dev->hw_features & NETIF_F_TSO6)
+			headroom = sizeof(struct qeth_hdr_tso) + VLAN_HLEN;
+		else if (card->dev->hw_features & NETIF_F_TSO)
+			headroom = sizeof(struct qeth_hdr_tso);
+		else
+			headroom = sizeof(struct qeth_hdr) + VLAN_HLEN;
 	} else if (card->info.type == QETH_CARD_TYPE_IQD) {
 		card->dev->flags |= IFF_NOARP;
 		card->dev->netdev_ops = &qeth_l3_netdev_ops;
+		headroom = sizeof(struct qeth_hdr) - ETH_HLEN;
 
 		rc = qeth_l3_iqd_read_initial_mac(card);
 		if (rc)
@@ -2555,19 +2372,22 @@ static int qeth_l3_setup_netdev(struct qeth_card *card)
 	} else
 		return -ENODEV;
 
+	card->dev->needed_headroom = headroom;
 	card->dev->ethtool_ops = &qeth_l3_ethtool_ops;
-	card->dev->needed_headroom = sizeof(struct qeth_hdr) - ETH_HLEN;
 	card->dev->features |=	NETIF_F_HW_VLAN_CTAG_TX |
 				NETIF_F_HW_VLAN_CTAG_RX |
 				NETIF_F_HW_VLAN_CTAG_FILTER;
 
 	netif_keep_dst(card->dev);
-	if (card->dev->hw_features & NETIF_F_TSO)
+	if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6))
 		netif_set_gso_max_size(card->dev,
 				       PAGE_SIZE * (QETH_MAX_BUFFER_ELEMENTS(card) - 1));
 
 	netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
 	rc = register_netdev(card->dev);
+	if (!rc && carrier_ok)
+		netif_carrier_on(card->dev);
+
 out:
 	if (rc)
 		card->dev->netdev_ops = NULL;
@@ -2591,7 +2411,6 @@ static int qeth_l3_probe_device(struct ccwgroup_device *gdev)
 	}
 	hash_init(card->ip_htable);
 	hash_init(card->ip_mc_htable);
-	card->options.layer2 = 0;
 	card->info.hwtrap = 0;
 	return 0;
 }
@@ -2609,7 +2428,8 @@ static void qeth_l3_remove_device(struct ccwgroup_device *cgdev)
 	if (cgdev->state == CCWGROUP_ONLINE)
 		qeth_l3_set_offline(cgdev);
 
-	unregister_netdev(card->dev);
+	if (qeth_netdev_is_registered(card->dev))
+		unregister_netdev(card->dev);
 	qeth_l3_clear_ip_htable(card, 0);
 	qeth_l3_clear_ipato_list(card);
 }
@@ -2619,6 +2439,7 @@ static int __qeth_l3_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 	int rc = 0;
 	enum qeth_card_states recover_flag;
+	bool carrier_ok;
 
 	mutex_lock(&card->discipline_mutex);
 	mutex_lock(&card->conf_mutex);
@@ -2626,14 +2447,14 @@ static int __qeth_l3_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 	QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 
 	recover_flag = card->state;
-	rc = qeth_core_hardsetup_card(card);
+	rc = qeth_core_hardsetup_card(card, &carrier_ok);
 	if (rc) {
 		QETH_DBF_TEXT_(SETUP, 2, "2err%04x", rc);
 		rc = -ENODEV;
 		goto out_remove;
 	}
 
-	rc = qeth_l3_setup_netdev(card);
+	rc = qeth_l3_setup_netdev(card, carrier_ok);
 	if (rc)
 		goto out_remove;
 
@@ -2678,10 +2499,6 @@ static int __qeth_l3_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 
 	qeth_set_allowed_threads(card, 0xffffffff, 0);
 	qeth_l3_recover_ip(card);
-	if (card->lan_online)
-		netif_carrier_on(card->dev);
-	else
-		netif_carrier_off(card->dev);
 
 	qeth_enable_hw_features(card->dev);
 	if (recover_flag == CARD_STATE_RECOVER) {
@@ -2819,9 +2636,6 @@ static int qeth_l3_pm_resume(struct ccwgroup_device *gdev)
 	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 	int rc = 0;
 
-	if (gdev->state == CCWGROUP_OFFLINE)
-		goto out;
-
 	if (card->state == CARD_STATE_RECOVER) {
 		rc = __qeth_l3_set_online(card->gdev, 1);
 		if (rc) {
@@ -2831,7 +2645,7 @@ static int qeth_l3_pm_resume(struct ccwgroup_device *gdev)
 		}
 	} else
 		rc = __qeth_l3_set_online(card->gdev, 0);
-out:
+
 	qeth_set_allowed_threads(card, 0xffffffff, 0);
 	netif_device_attach(card->dev);
 	if (rc)